#
# PerfectSched
#
# Copyright (C) 2012 FURUHASHI Sadayuki
#
#    Licensed under the Apache License, Version 2.0 (the "License");
#    you may not use this file except in compliance with the License.
#    You may obtain a copy of the License at
#
#        http://www.apache.org/licenses/LICENSE-2.0
#
#    Unless required by applicable law or agreed to in writing, software
#    distributed under the License is distributed on an "AS IS" BASIS,
#    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#    See the License for the specific language governing permissions and
#    limitations under the License.
#

module PerfectSched
  module Backend
    def self.new_backend(client, config)
      case config[:type]
      when nil
        raise ConfigError, "'type' option is not set"
      when 'rdb_compat'
        require_backend('rdb_compat')
        RDBCompatBackend.new(client, config)
      end
    end

    def self.require_backend(fname)
      require File.expand_path("backend/#{fname}", File.dirname(__FILE__))
    end
  end

  module BackendHelper
    def initialize(client, config)
      @client = client
      @config = config
    end

    attr_reader :client

    def close
      # do nothing by default
    end
  end
end

